We do maintenance of a the equipment daily, and check the bike quality before every tour. You lie here.
99, 99% of our guests are good loyal people. However always exceptions exists. As you.
We remember your case, when you start yelling that your guide is non-Czech by his nation as it was expected by you. We told you please you have to respect the guide and people around, we are international company and nationalismus not possible at all.
But as I see, you harbored a grudge and decided to take revenge.